157 lines
4.6 KiB
Diff
157 lines
4.6 KiB
Diff
commit c91008d3490e4e3ce29520068405f081f0d368ca
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Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Tue Jul 20 13:47:36 2021 -0300
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elf: Add _dl_audit_objsearch
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It consolidates the code required to call la_objsearch audit
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callback.
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Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.
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Reviewed-by: Florian Weimer <fweimer@redhat.com>
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diff --git a/elf/dl-audit.c b/elf/dl-audit.c
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index 74b87f4b39be75e1..5682427220569d90 100644
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--- a/elf/dl-audit.c
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+++ b/elf/dl-audit.c
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@@ -44,6 +44,28 @@ _dl_audit_activity_nsid (Lmid_t nsid, int action)
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_dl_audit_activity_map (head, action);
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}
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+const char *
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+_dl_audit_objsearch (const char *name, struct link_map *l, unsigned int code)
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+{
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+ if (l == NULL || l->l_auditing || code == 0)
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+ return name;
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+
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+ struct audit_ifaces *afct = GLRO(dl_audit);
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+ for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
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+ {
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+ if (afct->objsearch != NULL)
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+ {
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+ struct auditstate *state = link_map_audit_state (l, cnt);
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+ name = afct->objsearch (name, &state->cookie, code);
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+ if (name == NULL)
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+ return NULL;
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+ }
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+ afct = afct->next;
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+ }
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+
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+ return name;
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+}
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+
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void
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_dl_audit_objopen (struct link_map *l, Lmid_t nsid)
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{
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diff --git a/elf/dl-load.c b/elf/dl-load.c
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index 8a18c761bb753e37..1613217a236c7fc3 100644
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--- a/elf/dl-load.c
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+++ b/elf/dl-load.c
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@@ -1517,32 +1517,20 @@ open_verify (const char *name, int fd,
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#ifdef SHARED
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/* Give the auditing libraries a chance. */
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- if (__glibc_unlikely (GLRO(dl_naudit) > 0) && whatcode != 0
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- && loader->l_auditing == 0)
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+ if (__glibc_unlikely (GLRO(dl_naudit) > 0))
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{
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const char *original_name = name;
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- struct audit_ifaces *afct = GLRO(dl_audit);
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- for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
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- {
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- if (afct->objsearch != NULL)
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- {
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- struct auditstate *state = link_map_audit_state (loader, cnt);
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- name = afct->objsearch (name, &state->cookie, whatcode);
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- if (name == NULL)
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- /* Ignore the path. */
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- return -1;
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- }
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-
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- afct = afct->next;
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- }
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+ name = _dl_audit_objsearch (name, loader, whatcode);
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+ if (name == NULL)
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+ return -1;
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if (fd != -1 && name != original_name && strcmp (name, original_name))
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- {
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- /* An audit library changed what we're supposed to open,
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- so FD no longer matches it. */
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- __close_nocancel (fd);
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- fd = -1;
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- }
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+ {
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+ /* An audit library changed what we're supposed to open,
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+ so FD no longer matches it. */
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+ __close_nocancel (fd);
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+ fd = -1;
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+ }
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}
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#endif
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@@ -1992,36 +1980,17 @@ _dl_map_object (struct link_map *loader, const char *name,
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#ifdef SHARED
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/* Give the auditing libraries a chance to change the name before we
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try anything. */
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- if (__glibc_unlikely (GLRO(dl_naudit) > 0)
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- && (loader == NULL || loader->l_auditing == 0))
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+ if (__glibc_unlikely (GLRO(dl_naudit) > 0))
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{
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- struct audit_ifaces *afct = GLRO(dl_audit);
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- for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
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+ const char *before = name;
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+ name = _dl_audit_objsearch (name, loader, LA_SER_ORIG);
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+ if (name == NULL)
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{
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- if (afct->objsearch != NULL)
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- {
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- const char *before = name;
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- struct auditstate *state = link_map_audit_state (loader, cnt);
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- name = afct->objsearch (name, &state->cookie, LA_SER_ORIG);
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- if (name == NULL)
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- {
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- /* Do not try anything further. */
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- fd = -1;
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- goto no_file;
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- }
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- if (before != name && strcmp (before, name) != 0)
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- {
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- if (__glibc_unlikely (GLRO(dl_debug_mask) & DL_DEBUG_FILES))
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- _dl_debug_printf ("audit changed filename %s -> %s\n",
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- before, name);
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-
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- if (origname == NULL)
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- origname = before;
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- }
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- }
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-
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- afct = afct->next;
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+ fd = -1;
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+ goto no_file;
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}
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+ if (before != name && strcmp (before, name) != 0)
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+ origname = before;
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}
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#endif
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diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
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index 05737342d6287233..da83e717e8cd8e0b 100644
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--- a/sysdeps/generic/ldsodefs.h
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+++ b/sysdeps/generic/ldsodefs.h
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@@ -1269,6 +1269,13 @@ link_map_audit_state (struct link_map *l, size_t index)
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return &l->l_audit[index];
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}
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+/* Call the la_objsearch from the audit modules from the link map L. If
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+ ORIGNAME is non NULL, it is updated with the revious name prior calling
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+ la_objsearch. */
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+const char *_dl_audit_objsearch (const char *name, struct link_map *l,
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+ unsigned int code)
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+ attribute_hidden;
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+
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/* Call the la_activity from the audit modules from the link map L and issues
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the ACTION argument. */
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void _dl_audit_activity_map (struct link_map *l, int action)
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